The Millennium II (M21) single channel universal
transmitters have been engineered from the
ground-up to include the innovative features
that managers and operators in the field
demand, while providing rock solid day-to-day
operation, even in the most extreme conditions.
The Millennium II redefines what you expect
from a fixed gas detection solution.
M21 (SS & AL) shown with SX3 Series Sensors
Product Data Sheet
July 2016
Universal transmitter — compatible with all
sensor types (infrared, catalytic bead, and
electrochemical)
Wide voltage range allows for greater stability
and system compatibility
Lowest power consumption available
Universal Transmitter
The transmitter can be tted with a wide range of toxic or
combustible gas sensors. Sensors are pre-calibrated and
easily connected to the transmitter which recognizes a newly
tted sensor, automatically uploading the sensor’s speci c
con guration pro le.
Digital Communications
Sensor and transmitter continuously communicate digitally,
giving you the con dence of stable, accurate protection with
fast response times even over long separation distances.
Easy To Use Menus
English, French, Portuguese, or Spanish display languages
included. The full text menu makes installation, operation, and
calibration simple. No manual necessary!
Full diagnostics with event and data logging Intuitive menu system provides operators with
non-intrusive set-up and calibration interface
Field selectable gas curves and ranges Long range (+2,000 ft/600 m) sensor separation
Superior OLED Display
The only full graphic OLED display available, easy to read in all
ambient lighting conditions.
Analog, Relay, Modbus RS485 RTU
& HART
Multiple communication protocols are available combined with
relays to allow the M21 Transmitter to work seamlessly with
your system.
®
Field-proven Sensor Innovations
All of our sensors are engineered to be fast and reliable
with eld-proven performance in the harshest industrial
conditions possible. These include a full range of fast response
Electrochemical toxic gas sensors. For combustible gas
detection, poison resistant Catalytic Bead technology with
SensorGuard, which greatly prolongs sensor life and Infrared
sensor technology utilizing a dual beam design with no mirrors
that can become contaminated (“fogged up”) or misaligned.
M21 Transmitter
Specifications
Table 1 - Millennium II M21 Single Channel Transmitter
Electrical
Power Consumption 2.4 W @ 24 VDC (average - varies by sensor types/quantities)
®
Voltage Range10.5–32.0 VDC (HART
EMC ComplianceEN 50270:2006 per EMC directive 2004/108/EC
DisplayOrganic LED (OLED), Power/Status LED‘s
Environmental
Temperature-67 °F to +185 °F (-55 °C to +85 °C ) - Stainless steel
-58 °F to +185 °F (-50 °C to+85 °C ) - Stainless steel - North American explosion-proof certication
Current loop test jacks for each channel on faceplate Non-intrusive one man calibration (magnetic switch) Field selectable toxic gas ranges Redundant menu access via push buttons Sensor enable/disable option from menu (Cl1, Div2) Alarm relays congurable/assignable to any channel Displayed event logging (980 events) Easily retrieve last calibration data from sensor Four languages - English, French, Spanish, Portuguese
Accessories
Mounting Bracket Complete With Hardware Sun Shade/Deluge Protection Duct Mount and Hardware Kit
2EmersonProcess.com/FlameGasDetection
July 2016
Figure 1 - Millennium II M21 Single Channel Transmitter Dimensions
M21 Transmitter
Accessories
Table 2 - Accessories
Accessories
UDM-001Universal duct mount assembly with 1 m inlet sampling pipe - Stainless Steel
UDM-002Universal duct mount assembly with 1.5 m inlet sampling pipe - Stainless Steel
UDM-003Universal duct mount assembly - Stainless Steel
UDM-EX11 m extension - for use with UDM-001 and UDM-002 - Stainless Steel
UDM-EX21.5 m extension - for use with UDM-001 and UDM-002 - Stainless Steel
The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount and
the Rosemount logotype are registered trademarks of Rosemount Inc. All other marks are the
property of their respective owners.
The contents of this publication are presented for information purposes only, and while effort
has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their
use or applicability. All sales are governed by our terms and conditions, which are available on
request. We reserve the right to modify or improve the designs or specications of our products
at any time without notice.
Analyticexpert.com
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Middle East & Asia
Emerson Process Management
Emerson FZE
Jebel Ali Free Zone
Dubai, UAE
P.O. Box 17033
T + 971 4 811 8100
F + 971 4 886 5465
Safety.CSC@Emerson.com
Asia Pacific
Emerson Process Management
1 Pandan Crescent
Singapore 128461
Singapore
T + 65 777 8211
F + 65 777 0947
Safety.CSC@Emerson.com
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